jupyter notebook/hub is a bit too bright for my tastes. Let's introduce themes and try a darker mode.
Commands:
install command
pip install jupyterthemes
show list of jupyterthemes
jt -l
#chanage theme
jt -t onedork
#reset theme
jt -r
#Advanced theme option:
jt -t onedork -fs 95 -altp -tfs 11 -nfs 115 -cellw 80% -T